至於 “on/in/at (a farm)”,三種寫法也有人用,若在非正式的場合,又或意在泛指「在一個農場」,三種寫法也可接受。由於已撇除第三句,餘下只有第一句及第二句。如題目沒有提供圖片,兩句也可接受。在此情況,如要選擇一句,可選第一句 “There are many pigs on that farm.” 因為“in” 較適用於形容農場中的某一地點,如 “in a farm market”和“in a farm pond”。
Old MacDonald had a farm, eee-yi-eee-yi-oh
And [ON] this farm he had a cow, eee-yi-eee-yi-oh
With a moo moo here and a moo moo there
Here a moo, there a moo, everywhere a moo moo
Old Mac Donald had a farm, eee-yi-eee-yi-oh